Magnetic particles for magnetic toner and process for producing the same
US5874019A · kind A · utility
14Cited by
7References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 14, 1996 |
| Grant date | Feb 23, 1999 |
| Priority date | — |
| Expiry date | Jun 14, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2995
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Magnetic particles for a magnetic toner comprise: PA1 Fe.sup.2+ -containing iron oxide particles having an average particle size of 0.05 to 0.30 .mu.m, PA1 containing not less than 0.9 atm % and less than 1.7 atm % of silicon, calculated as Si, based on Fe, PA1 having a substantially cubic shape each ridge of which has a curved surface, and PA1 having a ratio .phi. represented by the following formula of more than 1.0 and less than 1.4: EQU .phi.=l/w wherein l represents an average maximum length of said Fe.sup.2+ -containing particles and w represents an average minimum length of said Fe.sup.2+ -containing particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.